title: The role of normal versus twisted intramolecular charge transfer fluorescence in predicting the forms of inclusion complexes of ethyl-4-dialkylaminobenzoate with α-cyclodextrin in aqueous solution.
abstract: An evidence is introduced through the b- and the twisted intramolecular charge transfer (TICT) fluorescence of ethyl-4-(N,N-dimethylamino)benzoate (EDMAB) and ethyl-4-(N,N-diethylamino)benzoate (EDEAB), confirming the role of donor size on the formation and emission of various inclusion complexes formed between these probes and α-CD in aqueous solution. A large variation in the b-fluorescence band of EDEAB as compared to that of EDMAB and a large variation in the TICT-fluorescence band of EDMAB as compared to that EDEAB, as the concentration of α-CD is increased in their aqueous solutions are observed. These variations are supported by time resolved fluorescence (TRF) spectra, fluorescence decay lifetimes and red edge effect (REE) results.
authors.affiliation: Department of Chemistry, Faculty of Science, Yarmouk University, 21163, Irbid, Jordan, kalhassan@yu.edu.jo.
authors.forename: Khader A
authors.initials: KA
authors.lastname: Al-Hassan